I'll try to keep a better eye on the Alaska forum...
Anyway, from now until the end of January would be a fine time to come see the Northern Lights. You can certainly see some spectacular views from ANC, but for the whole experience I'd recommend flying to FAI and going out to Chena Hot Springs.
Here's a link with more info:
http://www.chenahotsprings.com
email me if you have any other questions, or just reply here and I'll check every few days.
Your FT friend,
-eastwest